TY - JOUR
T1 - The Design of Fused Amine/Carbonyl System for Efficient Thermally Activated Delayed Fluorescence
T2 - Novel Multiple Resonance Core and Electron Acceptor
AU - Yuan, Yi
AU - Tang, Xun
AU - Du, Xiao Yang
AU - Hu, Yun
AU - Yu, You Jun
AU - Jiang, Zuo Quan
AU - Liao, Liang Sheng
AU - Lee, Shuit Tong
N1 - Funding Information:
The authors acknowledge the financial support from the National Natural Science Foundation of China (Grant Nos. 61575136, 21572152, and 51873139) and the National Key R&D Program of China (Grant No. 2016YFB0400703). This project was also funded by the Collaborative Innovation Center of Suzhou Nano Science and Technology (Nano-CIC), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the 111 Project and the Joint International Research Laboratory of Carbon-Based Functional Materials and Devices.
Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/4/4
Y1 - 2019/4/4
N2 - Multiple resonances induced thermally activated delayed fluorescence (MR-TADF) has great advantages in high color purity display. Up to now, current MR-TADF emitters are only based on the boron-nitrogen-containing fragment. Reported herein is a novel class of MR-TADF emitter, quinolino[3,2,1-de]acridine-5,9-dione (QAO), realized by the opposite resonance effect of the carbonyl and the nitrogen atoms, which is also the smallest TADF emitter reported so far. The QAO-based pure blue organic light-emitting diode achieves a maximum external quantum efficiency (EQE max ) of 19.4% with a small full width at half maximum of 39 nm. Moreover, tert-butyl modified QAO can be employed as an efficient electron acceptor to construct an efficient yellow-green evaporation and solution process feasible TADF emitter, 7-(tert-butyl)-3,11-bis(9,9-dimethylacridin-10(9H)-yl)quinolino[3,2,1-de]acridine-5,9-dione (QAO-DAd), with significantly improved performance as compared to the previous flexible diketone-based emitters.
AB - Multiple resonances induced thermally activated delayed fluorescence (MR-TADF) has great advantages in high color purity display. Up to now, current MR-TADF emitters are only based on the boron-nitrogen-containing fragment. Reported herein is a novel class of MR-TADF emitter, quinolino[3,2,1-de]acridine-5,9-dione (QAO), realized by the opposite resonance effect of the carbonyl and the nitrogen atoms, which is also the smallest TADF emitter reported so far. The QAO-based pure blue organic light-emitting diode achieves a maximum external quantum efficiency (EQE max ) of 19.4% with a small full width at half maximum of 39 nm. Moreover, tert-butyl modified QAO can be employed as an efficient electron acceptor to construct an efficient yellow-green evaporation and solution process feasible TADF emitter, 7-(tert-butyl)-3,11-bis(9,9-dimethylacridin-10(9H)-yl)quinolino[3,2,1-de]acridine-5,9-dione (QAO-DAd), with significantly improved performance as compared to the previous flexible diketone-based emitters.
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U2 - 10.1002/adom.201801536
DO - 10.1002/adom.201801536
M3 - Article
AN - SCOPUS:85059685891
VL - 7
JO - Advanced Optical Materials
JF - Advanced Optical Materials
SN - 2195-1071
IS - 7
M1 - 1801536
ER -